_______the morning of my 12th birthday选择:A,in B,on C,At D,from

问题描述:

_______the morning of my 12th birthday选择:A,in B,on C,At D,from

B,
在具体某一天用on我也知道某一天介词用on,不过我想my 12th birthday属不属于某一天my 12th birthday就是每年的这一天,是具体的某一天